Perhaps you should try some spelling variations:
"thong trinh cau snippets" » "thong tinh cau snippets", "chuong trinh cau snippets", "phuong trinh cau snippets", "thong trinh chat snippets", "thong trinh chao snippets", "thong trinh tu snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("thong trinh cau snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thong trinh cau snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thong trinh cau snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thong trinh cau snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.